taitruong

val list = "Hello, Scala".toList                //> list  : List[Char] = List(H, e, l, l, o, ,,  , S, c, a, l, a)
list.foreach(print(_))                          //> Hello, Scala
println                                         //> 

taitruong

object ScalaHackSession {
  //method calls instead of infix operators
  (1).+(1)                                        //> res0: Int(2) = 2
  1. + (1)                                        //> res1: Double(2.0) = 2.0
  "Hello, Scala".indexOf("a")                     //> res2: Int = 9
  "Hello, Scala".indexOf("a", 10)                 //> res3: Int = 11

  //method calls instead of unary prefix operators
  true.unary_!                                    //> res4: Boolean = false
  (1 - 2).unary_+                                 //> res5: Int = -1

taitruong

object ScalaHackSession {
	val immutable: String = "Hello, Scala"    //> immutable  : String = Hello, Scala
	var mutable = immutable                   //> mutable  : String = Hello, Scala
	mutable = "Hello, Hacker"
	println(mutable)                          //> Hello, Hacker
}

taitruong

object ScalaHackSession {
	val i = 0                                 //> i  : Int = 0
	val scope = "outer scope"                 //> scope  : String = outer scope
	if (i == 0) {
		val scope = "inner scope"
		println(scope + ": " + i)
	}                                         //> inner scope: 0
}

taitruong

object ScalaHackSession {
	var a = 0                                 //> a  : Int = 0
	if (a < 10) a = a + 1
	println(a)                                //> 1
	
	if (a < 10) a = a +
	1
	println(a)                                //> 2
}

taitruong

object ScalaHackSession {
	var a = 0                                 //> a  : Int = 0
	if (a < 10) a = a + 1
	println(a)                                //> 1
	
	if (a < 10) a = a
	+ 1                                       //> res0: Int = 1
	println(a)                                //> 1
}

taitruong

object ScalaHackSession {
  var a = 0                                       //> a  : Int = 0
  if (a < 10) a = a + 1
  println(a)                                      //> 1

  if (a < 10) a = (a
  + 1)
  println(a)                                      //> 2
}

taitruong

object ScalaHackSession {
  var a = 0                                       //> a  : Int = 0
  if (a < 10) a = a + 1
  println(a)                                      //> 1

  if (a < 10) {
  	a = a + 1
  }
  println(a)                                      //> 2
}

taitruong

object ScalaHackSession {
  var a = 0                                       //> a  : Int = 0
  if (a < 10) a = a + 1
  println(a)                                      //> 1

  if (a < 10) a = {
    println("before: " + a)
    a + 1
  }                                               //> before: 1
  println("after: " + a)                          //> after: 2

taitruong

object ScalaHackSession {
  class ScalaFun
  new ScalaFun()                                  //> res0: ScalaHackSession.ScalaFun = ScalaHackSession$ScalaFun@1f7ebc89
  new ScalaFun                                    //> res1: ScalaHackSession.ScalaFun = ScalaHackSession$ScalaFun@b886fb3
}